/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void BeepStop(void) {
	HAL_TIM_PWM_Stop(&htim4,TIM_CHANNEL_1);
}

void BeepStart(uint32_t freq) {
	uint32_t Period;

	BeepStop();
	Period = 1000000/freq;
	htim4.Init.Period = Period;
	HAL_TIM_PWM_Init(&htim4);
	HAL_TIM_Base_Start_IT(&htim4);
	HAL_TIM_PWM_Start(&htim4,TIM_CHANNEL_1);
	//设置指定占空比50%
	__HAL_TIM_SET_COMPARE(&htim4,TIM_CHANNEL_1, Period>>1);
}

void LedON (int state) {
	switch(state){
		case 4:
			HAL_GPIO_WritePin(GPIOI, GPIO_PIN_10, GPIO_PIN_SET);
		case 3:
			HAL_GPIO_WritePin(GPIOI, GPIO_PIN_11, GPIO_PIN_SET);
		case 2:
			HAL_GPIO_WritePin(GPIOF, GPIO_PIN_1, GPIO_PIN_SET);
		case 1:
			HAL_GPIO_WritePin(GPIOC, GPIO_PIN_7, GPIO_PIN_SET);
	}
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
	uint32_t ticksNow;
	uint32_t beepOffTime = 0;
	uint8_t isBeepOn = 0;
	uint8_t keyPress = 0;
	uint32_t curBeepFreq = 0;
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  if(IS_ENGINEERING_BOOT_MODE())
  {
    /* Configure the system clock */
    SystemClock_Config();
  }

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
	MX_GPIO_Init();
	MX_TIM4_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
	isBeepOn = 0;
	while (1)
	{
		keyPress = 0;
		ticksNow = HAL_GetTick();
		if (HAL_GPIO_ReadPin(GPIOE, GPIO_PIN_9) == GPIO_PIN_RESET) {
			keyPress |= 0x01;
		}
		if (HAL_GPIO_ReadPin(GPIOG, GPIO_PIN_2) == GPIO_PIN_RESET) {
			keyPress |= 0x02;
		}
		if (HAL_GPIO_ReadPin(GPIOG, GPIO_PIN_1) == GPIO_PIN_RESET) {
			keyPress |= 0x04;
		}
		if (HAL_GPIO_ReadPin(GPIOG, GPIO_PIN_0) == GPIO_PIN_RESET) {
			keyPress |= 0x08;
		}
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		if (keyPress != 0) {
			uint32_t newFreq = 0;
			switch(keyPress){
				case 0x01: newFreq=261; LedON(1); break;
				case 0x02: newFreq=293; LedON(2); break;
				case 0x04: newFreq=329; LedON(3); break;
				case 0x08: newFreq=349; LedON(4); break;
				case 0x03: newFreq=392; break;
				case 0x05: newFreq=440; break;
				case 0x09: newFreq=493; break;
				default: break;
			}
			if (newFreq > 0) { //检测到有效的按键
				//如果新的频率不等于正在发声的频率，或者是当前蜂鸣器没打开，直接打开
				if ((curBeepFreq != newFreq) || (isBeepOn == 0)) {
					BeepStart(newFreq);
					isBeepOn = 1;
					curBeepFreq = newFreq; //记录下当前的最新频率
				}

				//只要是按下的，时间就增加,确保是一件一直鸣叫
				beepOffTime = ticksNow + 200;
			}
		} // end if (keyPress != 0) {

		//如果蜂鸣器鸣叫中，而且鸣叫时间已经超过了，可以停止了
		if ((isBeepOn == 1) && (ticksNow > beepOffTime)) {
			isBeepOn = 0;
			curBeepFreq = 0;
			BeepStop();
		}

	} // while (1)

  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDivValue = RCC_HSI_DIV1;
  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.PLL2.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.PLL3.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.PLL4.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** RCC Clock Config
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_ACLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_PCLK3|RCC_CLOCKTYPE_PCLK4
                              |RCC_CLOCKTYPE_PCLK5;
  RCC_ClkInitStruct.AXISSInit.AXI_Clock = RCC_AXISSOURCE_HSI;
  RCC_ClkInitStruct.AXISSInit.AXI_Div = RCC_AXI_DIV1;
  RCC_ClkInitStruct.MCUInit.MCU_Clock = RCC_MCUSSOURCE_HSI;
  RCC_ClkInitStruct.MCUInit.MCU_Div = RCC_MCU_DIV1;
  RCC_ClkInitStruct.APB4_Div = RCC_APB4_DIV1;
  RCC_ClkInitStruct.APB5_Div = RCC_APB5_DIV1;
  RCC_ClkInitStruct.APB1_Div = RCC_APB1_DIV1;
  RCC_ClkInitStruct.APB2_Div = RCC_APB2_DIV1;
  RCC_ClkInitStruct.APB3_Div = RCC_APB3_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
